Fs2004 Addons -

The FS2004 community is legendary for freeware. These addons rival payware quality.

While HiFi now makes modern weather engines, Active Sky Evolution (ASE) for FS2004 is still available. It generates real-world weather (METAR), creates realistic wind shear, and replaces the static default clouds with volumetric 3D clouds. For a free alternative, use FS2004 Real Weather (community script). fs2004 addons

The FS2004 addon ecosystem transformed the simulator from a “game” into a serious training tool and hobbyist platform: The FS2004 community is legendary for freeware